氟橡胶耐热氧老化性能的研究

研究炭黑N330/N990用量比对过氧化物硫化体系氟橡胶物理性能和耐热氧老化性能的影响,并与双酚A硫化体系氟橡胶进行比较。结果表明:随着炭黑N330/N990用量比增大,过氧化物硫化体系氟橡胶的物理性能和耐热氧老化性能提高,压缩永久变形明显减小;当炭黑N330/N990用量比较大时,氟橡胶的物理性能变化不大;与双酚A硫化体系氟橡胶相比,过氧化物硫化体系氟橡胶的硬度和定伸应力较小,拉伸强度和拉断伸长率较大,耐热氧老化性能较好。

Study on Thermal Oxidative Aging Resistance of Fluoro Rubber

In this paper, we studied the effects of the ratio of carbon black N330 and carbon black N990 on aging properties of fluoroelastomers cured with peroxide curing system in the air and we compared it with fluoroelastomers cured with bisphenol fluorine curing system. The results showed that the physical and mechanical properties and aging properties of fluoroelastomers cured with peroxide curing system increased with the increase in the ratio of carbon black N330 and carbon black N990 in the proper range, also compression deformation decreased obviously. fluoroelastomers cured with peroxide curing system exhibited higher tensile strength and elongation at break than fluoroelastomers cured with bisphenol fluorine curing system, however its hardness and modulus at 100% were lower. Meanwhile, fluoroelastomers cured with peroxide curing system showed more excellent aging properties.